Elapse-time computer and century-calendar machine.



A. VAN RENSSELAER & FwH. TENNEY.

ELAPSE TIME COMPUTER AND CENTURY CALENDAR MACHINE.

APPLICATION FILED NOV. '7, 1911. 1,041,204. Patented 0ct.15,1912.

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1,041,204. Patented 0011151912.

11 SHEETS-SHEET 2.

fWITIVESSE; g/T0115 W M A VAN RENSSELAER '& F. H. TENNEY. ELAPSE TIME COMPUTER AND CENTURY GALENDAB MACHINE.

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A. VAN RENSSELAER & F. H. TENNEY.

ELAPSE TIME COMPUTER AND CENTURY CALENDAR MAGHINE.

APPLICATION FILED NOV. 7, 1911.

1,041,204, Patented 0015.15, 1912.

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WITNESS I INVENTOILS 4 TTORNEY A. VAN RENSSELAER & F.H. TENNEY. ELAPSE TIME COMPUTER AND CENTURY CALENDAR MACHINE.

APPLICATION FILED NOV. 7, 1911.

1,041,204. Patented 0ct15,1912.

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ATTORNEY A. VAN RENSSBLAER & F. H. TENNEY. ELAPSE TIME COMPUTER AND CENTURY CALENDAR MAGHINE APPLICATION FILED NOV. 7, 1911. 1,041,204, Patented Oct. 15,1912.

' 11 SHEETS-811KB! 6.

5144M g" 5 /4f 7* ATTORNEY WITNESSES:

APPLICATION FILED NOV. 7, 1911.

Patented 001;. 15, 1912.

11 QHEETS SHEET 7.

A. VAN RENSSELAER & F. H. TBNNEY.

ELAPSB TIME COMPUTER AND CENTURY CALENDAR MACHINE. 1,041,204.

IN l/E N TOR 3 A TTORNEY WITNESS A. VAN RBNSSELAERK: F. H. TENNEY. ELAPSE TIME COMPUTER AND GENTURYGALENDAR MACHINE.

APPLICATION FILED NOV. 7, 1911.

Patented 001115, 1912.

11 SHEETSBEEET B.

5 :TQmKSmwEl uwmroni fi r ATTORNEY A. VAN RENSSELAER & F. H. TENNEY. ELAPSE TIME COMPUTER AND CENTURY CALENDAR MA CHINE.

APPLICATION FILED NOV. 7, 1911.

- Patented Oct; 15, 1912:

11 SHEETS-SHEET 9.

Ell Elllllllllll [I'll |.\lllm|l A TTORNEY A. VAN RENSSELABR & F. H. TENNEY.

ELA'PSE TIME COMPUTER AND CENTURY CALENDAR MACHINE.

APPLIOATION'IILED NOV. 7, 1911. Patented 15' 11 SHEETS-SHEET 10.

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BY ATTORNEY A. VAN RENSSELABR &-P. H. TENNEY. ELAPSE TIME COMPUTER AND CENTURY CALENDAR MACHINE.

APPLICATION FILED NOV. 7, 1911. 1,041,204; Patented Oct. 15, 1912 11 SHEETS-SHEET 11.

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WITNESSES:

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ATTORNEY UNITED STATES PATENT OFFICE.

ALLEN VAR IINBSRLAER AND FRED H. TE NNEY, F SPOKANE, WASHINGTON.

man-m GOKPUTER AND CENTURY-CALENDAR MACHINE.

Specification of Letters Patent.

Patented Oct. 15, 1912.

Application med November 7, 1911. Serial Io. 859,081.

Toall whom it may concern: Be it lmown that we, ALLEN VAN RENE- snmna and Fran H. TENNEY, citizens of the United States, residing at 1920 West River- 6 side avenue and 1507 West Fourth avenue, respectively, in the city of Spokane, in the county of Spokane and State of \Vashington, have invented a new and useful Ela se- Time Computer and CenturyCalendar a- 1 chine, of which the following is a specification.

Our invention consists in the novel arrangement of a calendar upon one chart and a calendar and numbers of elapsed days upon another chart, and the arrangement and construction of these two charts in relation to each other; and the objects ofour invention are, first, to determine expeditiously the number of days, not exceeding three hundred and sixty-five (365), that will elapse between two given dates; second, to determine expeditiously the date on which the last day of a given number of days, not exceeding three hundred and sixty-five, calculated from a given date, will fall; third, to obtain a calendar for any year in the twentieth century. We attain these objects by the mechanisms illustrated in the accompanying drawings, in which similar characters of reference indicate similar divisions and sub-divisions of parts. F igurel is aside elevation of the entire machine in which no part of the two charts, herein before mentioned and hereinafter de- 5 scribed, is visible, but will be on the machine itself, because of the difiiculty and impossibility of practically executing a drawing, making any portion of these charts visible; F i 2 is an end elevation of the 0 entire mac 'ne; Fig. 3 is a part vertical cross-section taken on line j of Fig. 1, the scale of which is to the scal e of Fig. 1 as 12 is to 1; Fig. 4 is a part section through end of Fig. 1, and is drawn to the same scale as Fig. 3; Fi 5 is one of the two charts and shall be re erred to in the detailed description as chart L. This figure is drawn on Sheets 2 to 5 inclusive, which sheets must be joined as follows to make the entire figure: 1; fof Sheet 2 to b j of Sheet 3, c g of Sheet 3 to c g of Sheet 4, and f g of Sheet 3 to f g of Sheet 5; Fig. 6 is the other of the two charts and shall be referred to in the detailed description as chart N. This figure 5 is drawn on Sheets 6 to 11 inclusive, which the number in and the supports sheets must be j oined as follows to make the entire figure: n r of Sheet 6 to n r of Sheet 7, 0 a of Sheet 7 to o 8 of Sheet 8, q r

of Sheet 6 to g r of Sheet 9, 1- s of Sheet 7 to r a of Sheet 10, and a t of Sheet 8 to e t of go Sheet 11.

Chart L and chart N, Fig. 4, are the essential parts of this machine. Chart L consists, first, of calendar d, which is a calendar of all the months and days of the months Q5 in a year, so arranged that the number of days from any date in any month to the date appearing directly thereunder in the succeeding month, is in every instance whic when the machine is made up as hereinafter described, can be read chart N;

third, of common year indicating arrow 12 and leap year indicating arrow is; fourth,

of elapsed-time opening :22. 1|;

Chart N consists of, first, calendar h, on

which the months and days of the months 1n 9. year are arranged in the same manner as on calendar d, chart L; on calendar it occur and reoccur the days of the week, also second, elapsed-days numbers m, which is a chart within itself made up of repetitions of numbers from 1 to 365 inclusive, which numbers are arranged in twenty-three rows in such relation to each other that the dif- 86 ference between any number in any row and the row directly over it, is in every instance thirty-one (31) 365 must be added to numbers from 1 to 30 in row 2 and from 1 to 31 in row y, in each instance, 90 to make this general scheme hold good as to rows 3 and z and the row directly under each of them; the numbers in elapsed-days numbers m, it will be observed, occur in many instances. within the same confine of space as calendar h: third, brackets e which brackets embrace the common years in the twentieth century: fourth, brackets 12 which brackets embrace the leap years in the twentieth century.

Referring specifically to Figs. 1, 3 and 4' of the accompanyin drawings, the base G It, constitute the frame work of the machine. The principal p'artsof the .device are, first, combination cylinder 106 A, Fig. 3, which is composed of two transparent cylinders, H and J, Fig. .4, and chart L, above described, between them, all snugly fitted together and securely fastened together with cement and rings 0, so as to .1

thirty-one (31); second, of slots a through 10 e as a unit. Q revolve on braclr "with a sliding lit; second, combination B, 4, which is composed of transparent cylinder K, Fig. 4:, and chart N above described, which chart is firmly tastened to the inside of said transparent-cylinder K. Combination cylinder B operates inside combination cylinder A, Felt strips M, i,

is narrow band extending from onehall to two-thirds of the distance around the outside of combination cylinder A, with an indicating pointat one end, the band being made of elastic material so that it clasps firmly to con'ibination cylinder A by virtue of its elasticity, and

can he slid laterally and cylindrically so that the indicating point can be placed at any point onthe surface of combination cylinder A. Transparent cylinders H, J and K will be made of material of such quality and degree of transparency that chart N can be read readily through the three. Charts L and N are placed in the proper relation to each other to accomplish the ob jects above set forth.

The method of operating this machine to attain the objects above set forth, is as follows: To determine the number of days that will elapse between two given dates, place indicator D, Fig. .1, on the later of the two given dates, on calendar 0i, chart lL, then rotate and slide combination cylinder B until the earlier of the two given dates appears on calendar in, chart N, in slot a directly over the date on which indicator D has been set; the number of elapsed days can then be read on elapsed-days numbers m, chart N, in elapsed-time opening at. If February 29 intervenes between the two given dates, add one to the result thus obtained. The moving parts may be revolved as a vunit to a'position where elapsed-time opening x will be visible to the operator, without disturbing the setting. To determine on what date the last day of a given number of days, calculated from a given date, will fall, rotate combi nation cylinder B in its normal position on til the month containing the given date ap pears in slot a, on calendar 72 chart N, over the month on calendar at, chart L, in which the last day will fall; the month in which the last day will fall can be, and must be calculated mentally; with the cylinders in this position, a numberwill be read on elapsed-days numbers we in elapsed-time any year in the o ening es, which will be near the given number. If this number is smaller than the glven number, slide combination cylinder is directly tothe right; if greater, to the left,

until the given number does appear in elapsed time openin w. With the given number of days in e apsed-time openings, the date on which the last day of the given number of days, will fall, will be found on calendar d, chart L, directly under the given date from which the calculation is made. it February 29 intervenes, the last day will fall a day earlier than the date thus obtained. To obtain the calendar for twentieth century, it the place the point oi ear is a common ear arrow 0, chart LL17 common year indicating to the point of bracket 6, chart N, embracing the year for which the calendar is sought. "When thus set, the two charts will form the calendar, the days of the weeks appearing on calendar 1i, chart N, in slots a over the dates on calendar d, chart L if the year for which the calendar is sought, is a leap year, place the point of leap year indicating arrow 7 to the point of bracket 0 embracing the year for which the calendar is sought.

Having thus fully described our machine, what we claim as new and desire to secure by Letters Patent is 1. ln an elapse time computer and century calendar machine, the combination of an outer chart and an inner chart, with an arrangement on the outer chart oi a calendar of the months and the dates of the months in regular order, in twelve horizontal, parallel rows with slots between the rows, and with a calendar of the months and dates of the months on the inner chart arranged in the same manner as the one on the outer chart except that there are no slots between the rows, and with an arrangement of numbers, called herein elapsed-days numbers, on the inner chart, ranging from 1 to 365 inclusive, in such order and in such relation to each other and in such relation and position to the calendar on the inner and outer charts and with the two calendars in such relation and position to each other, in short, the whole arrangement of the dates of the calendars and the elapsed-days numbers being in such manner that when two dates are selected, with not to exceed 365 days between them, and the inner chart is slid or slid and rotated, or placed by any means, in such a position to the outer chart that the earlier of the two dates selected will appear in the slot in the outer chart directly over the month containing the later date selected and at a point directly over said later date, the later date being located on the cal: endar on the outer chart, an elapsed-days number willinvariably appear at a fixed point below the calendar on the outer chart in an opening in the outer chart, called herein elapsed-time opening, provided at that point, which will be the number of days that will elapse between the two dates selected.

2. In an elapse time computer and century calendar machine, the combination of an outer chart and an inner chart, with an arrangement on the outer chart of a calendar of the months and the dates of the months in regular order, in twelve horizontal, parallel rows with slots between the rows, and with an arrangement of the days of the week in regular order, occurring and reoccurrin in twelve, horizontal, parallel rows, on t e inner chart, and with an arrangement of all the years in the twentieth century in the embraces of brackets on the inner chart, with the arrangement on the inner chart herein set forth in such relation and position of its parts to each other, and in such relation and position to the calendar on the outer chart and to two indicating arrows on the outer chart, one for common years and one for leap years, so that when the point of the indicating arrow is placed to the point of the bracket embracing the year for which the calendar is sought, which is done by sliding or sliding and revolving the inner chart to such position, the calendar for the year sought will invariably be formed by the names of the days of the weeks on the inner chart appearing in the slots on the outer chart directly over the dates on the outer chart, the two charts combined forming the calendar.

In testimony whereof We aflix our signatures in presence of two witnesses.

ALLEN VAN RENSSELAER. FRED H. TEN NEY.

Witnesses:

G. G. RIPLEY, W. R. SAMPSON. 

